[mmotm:master 128/293] kernel/sysctl.o:undefined reference to `fragment_stall_order_sysctl_handler'

[mmotm:master 128/293] kernel/sysctl.o:undefined reference to `fragment_stall_order_sysctl_handler'

[kbuild test robot]

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tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   7072a0ce81c613d27563eed5425727d1d8791f58
commit: e3e68607541c60671eb3499a2c064d2f71626da4 [128/293] mm: stall movable allocations until kswapd progresses during serious external fragmentation event
config: c6x-evmc6678_defconfig (attached as .config)
compiler: c6x-elf-gcc (GCC) 8.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout e3e68607541c60671eb3499a2c064d2f71626da4
        # save the attached .config to linux build tree
        GCC_VERSION=8.1.0 make.cross ARCH=c6x 

All errors (new ones prefixed by >>):

>> kernel/sysctl.o:(.fardata+0x5b4): undefined reference to `fragment_stall_order_sysctl_handler'

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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Re: [mmotm:master 128/293] kernel/sysctl.o:undefined reference to `fragment_stall_order_sysctl_handler'

[Mel Gorman]

On Wed, Dec 05, 2018 at 05:12:06PM +0800, kbuild test robot wrote:
> tree:   git://git.cmpxchg.org/linux-mmotm.git master
> head:   7072a0ce81c613d27563eed5425727d1d8791f58
> commit: e3e68607541c60671eb3499a2c064d2f71626da4 [128/293] mm: stall movable allocations until kswapd progresses during serious external fragmentation event
> config: c6x-evmc6678_defconfig (attached as .config)
> compiler: c6x-elf-gcc (GCC) 8.1.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git checkout e3e68607541c60671eb3499a2c064d2f71626da4
>         # save the attached .config to linux build tree
>         GCC_VERSION=8.1.0 make.cross ARCH=c6x 
> 
> All errors (new ones prefixed by >>):
> 

This appears to be some sort of glitch in Andrew's tree. It works in
mmots and is broken in mmotm. The problem is that with mmotm, the
fragment_stall_order_sysctl_handler handler has moved below
sysctl_min_slab_ratio_sysctl_handler instead of below
watermark_boost_factor_sysctl_handler where it belongs.

Now, while this could be fixed, in this specific instance I would prefer
the patch be dropped entirely because there are some potential downsides
that are potentially distracting and the supporting data is not strong
enough too justify the potential downsides.

Andrew?

-- 
Mel Gorman
SUSE Labs

Re: [mmotm:master 128/293] kernel/sysctl.o:undefined reference to `fragment_stall_order_sysctl_handler'

[Andrew Morton]

On Wed, 5 Dec 2018 11:20:01 +0000 Mel Gorman <mgorman@suse.de> wrote:

> On Wed, Dec 05, 2018 at 05:12:06PM +0800, kbuild test robot wrote:
> > tree:   git://git.cmpxchg.org/linux-mmotm.git master
> > head:   7072a0ce81c613d27563eed5425727d1d8791f58
> > commit: e3e68607541c60671eb3499a2c064d2f71626da4 [128/293] mm: stall movable allocations until kswapd progresses during serious external fragmentation event
> > config: c6x-evmc6678_defconfig (attached as .config)
> > compiler: c6x-elf-gcc (GCC) 8.1.0
> > reproduce:
> >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         git checkout e3e68607541c60671eb3499a2c064d2f71626da4
> >         # save the attached .config to linux build tree
> >         GCC_VERSION=8.1.0 make.cross ARCH=c6x 
> > 
> > All errors (new ones prefixed by >>):
> > 
> 
> This appears to be some sort of glitch in Andrew's tree. It works in
> mmots and is broken in mmotm. The problem is that with mmotm, the
> fragment_stall_order_sysctl_handler handler has moved below
> sysctl_min_slab_ratio_sysctl_handler instead of below
> watermark_boost_factor_sysctl_handler where it belongs.
> 
> Now, while this could be fixed, in this specific instance I would prefer
> the patch be dropped entirely because there are some potential downsides
> that are potentially distracting and the supporting data is not strong
> enough too justify the potential downsides.
> 
> Andrew?

Well that was an easy fix ;)

[mmotm:master 128/293] kernel/sysctl.o:undefined reference to `fragment_stall_order_sysctl_handler'

[kbuild test robot]

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tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   7072a0ce81c613d27563eed5425727d1d8791f58
commit: e3e68607541c60671eb3499a2c064d2f71626da4 [128/293] mm: stall movable allocations until kswapd progresses during serious external fragmentation event
config: sh-rsk7269_defconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout e3e68607541c60671eb3499a2c064d2f71626da4
        # save the attached .config to linux build tree
        GCC_VERSION=7.2.0 make.cross ARCH=sh 

All errors (new ones prefixed by >>):

>> kernel/sysctl.o:(.data+0x5b4): undefined reference to `fragment_stall_order_sysctl_handler'

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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